Paper threading device for drum winders



Feb. 19, 1935. w. J. BATTI$ON 1,992,114

PAPER THREADING DEVICE FOR DRUM WINDERS Filed June 4, 1954 3 VIII/Ill 6 6 x z-L E 3 l z i 1 Fl l '1 I17 J v7 i k wuc nto'b; E? SJ Patented Feb. 19, 1935' PAPER THREADING DEVICE. FOR, DRUM WINDERS William J. Battison, Canton, N. o, v Application June ,4, 1934, Serial No.. 729,036

3 Claims. (01. 242-65) This invention relatesto paper threading appliancesfor the drum winders of paper making machines. v

The object of the invention is to provide mechanical means for leading the lead end of a web of paper into contact with the surfaceof, and'over, the winding drum of a drumwinder. More specifically, the object of invention is the provision of a safety means for threading the drum winder, whereby that ordinarily hazardous manual operation may be effected without the necessity of close approach of the operator to the rolls of the machine;

Web threading devices have for some years been employed in carrying over the leading end of the paper web from the press rolls to the drier rolls, and also between sections of the drier assembly. Such prior art devices, which comprise, in essence, a pair of endless ropes, require for their successful operation a much longer travel than is available at the drum winder, andhence on the lattermachine are not able to present a gripping nip sufficient to grasp and. positively thread through the lead end of a paper web. Moreover, in attempting to convert such prior art devices to this use, it has been found that the excessive friction of one rope against the other results in the wearing out of the ropes in averybrief period, e. g., in ten to fourteen days operation. 7

I have now found that the object of the present invention may be effected by means of a device which comprises two pairs of relatively short endless belts one of which passes around an end extension of the cylindrical surface of the winding drum and is positively driven thereby, and a plurality of pulleys which extend and positively guide the belts. In this device the two belts lie in the same plane, circumferentially. One belt lies over the other, the upper belt contacting and being pressed against the lower, driven, one for the major portion of its span, by suitable position relationship between the pulleys and the end extension of the winding drum surface, thereby providing a relatively short nip therebetween for grasping and threading through the leading edge of a paper web. The upper belt is so positioned with respect to the end extension of the winding drum surface as to cross the top thereof, preferably extending for some distance on either side thereof, and in any event extending for some distance therefrom on the threading side thereof; The plane in which the belts lie is parallel and closely adjacent to the normal path or travel of the paper web over the surface of said winding drum. I

The invention will be described, in the followingaillustrative embodiment, ingreater detail and by reference to the accompanying drawing, in which latter: I r i Fig; Us a schematic end elevation of an organization embodying the safety device of the present invention;

- Fig. 2 is a fragmentary elevation of a portion of the winding drums showingthe safety device as viewed from the left hand side of'Fig. l; and

Fig. 3 is an enlarged fragmentary sectional elevation taken substantially in the plane of line 3-'-3-of Fig. 1. I

In the drawing: 1 represents a windingdrum carrying at one end thereof a grooved'pulley 2 which is rigidly secured to the'drum. The substantially flat base 3' of the groove iii-pulley 2 forms a section of cylinder having substantially the same diameter as that of the cylindrical surface of drum 1, hence providing what in efiect is an end extension of saiddrum surface, and provides a driving surface adapted as to width to'the flat endless belt'4. Belt 4 passes also over the grooved guide pulley 5. 6 represents a second flat endless belt lying above and in the same plane as belt 4, and 7 and 8 are grooved pulleys carrying belt 6. The arrangement of pulleys 5, '7 and 8, with respect to pulley 2, is such that belts 4 and'6 are brought together at or near pulley 8 and remain in positive contact with each other past the top of pulley 2 and until they reach a point adjacent pulley '7. Pulleys 7 and 8 may be driving pulleys, but in the illustrative embodiment are shown as being driven;

In operation: the lead end. of a paper web is directed by the operator into the nip between belts 4 and 6, in which nip the paper is grasped and by which belts it is drawn over the surface of drum 1 and to a point where an operator may safely manually direct the web to and start the winding up of the web on a suitable roll core means (not shown). The actual threading through of the advance end of the web is effected slightly off of the normal path of the web, but the web when once carried over the upper surface of drum 1 resumes the normal path therefor over the winding drum.

It will be appreciated that the inventive concept is not restricted to the specific forms of the elements illustrated in the foregoing example, and that the benefits from the invention may be realized while departing from that exact illustrative embodiment. Thus, the surface driving the lower belt may be an end extension of the surface of the windngdrum itself, provided that suitable guiding elements be mounted on the end of said drum, and closely adjacent to the normal path of travel of the web, for positively guiding the belt. Moreover, the exact relative positions of the belts and their pulleys as shown in the drawing may be varied to meet the exigencies of a particular organization, it being necessary only that the belts are brought into contact with each other, and positively pressed together, at a point on the threading side of, and safely remote from, the winding drum, and that they are maintained in this relationship over the top of the winding drum.

and for a sufficient distance past the latter.

I claim: 1. Safety web-threading appliance for drum winders of the type in which a web of paper is fed over the surface of a cylindrical windingdrum and is wound into a roll at a point adjacent the top of said surface, which appliance comprises a pair of endless belts circumferentially in the same plane and lying one above the other in a plane parallel and closely adjacent to the normal path of travel of apaper web over said winding drum, the lower of said belts passing over and being driven by an-end extension of the cylindrical surface of said winding drum and the upper of said belts crossing the top of said end extension, both belts extending for some distance to the threading side thereof, and a plurality of guide pulleys adapted to extend the belts and so positioned with respect to each other and to the said extension of the winding drum surface as to bring the belts into contact with each other, and positively press the same together, for a major portion of the span of the upper belt including the travel thereof over the top of said extension of the cylindrical winding drum surface.

2. Safety web-threading appliance for drum winders of the type in which a web of paper is fed over the surface of a cylindrical winding drum and is wound into a roll at a point adjacent the top of said surface, which appliance comprises a pair of endless flat belts circumferentially in the same plane and lying one above the other in plane parallel and closely adjacent to the normal path of travel of a paper web over said winding drum, the lower of said belts passing over and being driven by an end extension of the cylindrical surface of said winding drum and the upper of said belts crossing the top of said end extension, both belts extending for some distance to the threading side thereof, and a plurality, guide pulleys adapted to extend the belts and s'o positioned with respect to each other and to the said extension of the winding drum surface as to bring the belts into contact with each other, and positively press the same together, for a major portion of the span of the upper belt including the travel thereof over the top of said extension of the cylindrical winding drum surface.

3. Safety web-threading appliance for drum winders of the type in which a web of paper is 'fed over the surfaceof a cylindrical winding drum and is wound into a roll at a point adjacent the top of said surface, which appliance comprises a pair of endless belts oircumferentially in the same plane and lying one abovethe other in a plane parallel and closely adjacent to the normal path of travel of a paper web over saidwinding drum, the lower of said belts passing over and, being driven by an end extension of the cylindrical surface of said winding drum and the upper of said belts crossing thetop ofsaid end extension, both belts extending for some distance to the threading side thereof, and a plurality of guide pulleys adapted to extend the belts and so positioned with respect to each other and to the said extension of thewinding drum surface as to bring the belts into contact with each other, and positively press the same together, for a major portion of the span of the upper belt including the travel thereof over the top of said extensionof-the cylindrical winding drumsurface, the beltcarrying rings of said pulleys being of a width to accommodate the said belts and being provided at their rim edges With raised portions for the positive guiding of said belts. V r

WILLIAM J. BATTIS QN. 1 

